Burkhead, 28, went on IR after Week 3 with a neck injury, but he is eligible to play as soon as this week against the Minnesota Vikings.
He had 24 carries for 86 yards and three catches for 31 yards in three games before getting hurt.
The team has relied on James White and rookie first-round pick Sony Michel while also using wide receiver Cordarrelle Patterson as a running back in recent weeks.
Tobin, 28, spent training camp with the Patriots but didn't make it through final cuts. He latched on briefly with the San Francisco 49ers before returning to the Patriots in November, but he has yet to be active in a game this season.
--Field Level Media
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